The task of bringing wild creatures into our domestic fold is one of very varied difficulty. Many plants are easily reconciled to the conditions of our fields and gardens: they may be said to welcome the care of man which insures them some protection from the fierce contention with other life or with the elements to which they are exposed in their natural conditions. Only here and there is it necessary by careful breeding to develop domesticated habits to the point where the forms will endure culture. Where the task is, however, to make avail of some natural peculiarity which promises to be useful, but is not yet of economic value, it may require a hundred generations of careful selection to develop and fix desirable features. We are, however, in all cases sure in these half-animate species, the plants, that they will prove perfectly obedient to our will. It is otherwise, however, with wild animals. Here we have to deal with intelligences in which the most striking characteristic is an abiding fear of the master, and a general indisposition to submit to any other control than that of their native wild instincts. The measure in which this wilderness habit, bred of long contention with enemies, prevails in animals varies greatly. Some, as for instance the elephant, at once reconcile themselves to human association, and directly on being made slaves accept the mastery of their captors. Others, such as the zebra, remain for a lifetime possessed of their original savage nature. A large part of the labor which has been given to the work of domesticating by the breeder's art the score of mammalian species which man has won to his use has been devoted to this task of expelling the wilderness motives from these forms. The cases in which he has failed to accomplish this end are those in which the savage humor has persisted for so long a time that he has been forced to abandon his effort to subdue the stock.